Engine-lathe-apron oiling system.



F. B. COCKBURN.

ENGINE LATHE APRON OILING SYSTEM.

APPLICATION FILED JULY 2.1917.

L94b2 Patented Feb. 18, 1919.

2 SHEETSSHEET I.

C1 Horne/ Q- F. B. COCKBURN. ENGINE LATHE APRON OILING SYSTEM.

APPLICATION FILED JULY 2.1917.

Patented Feb. 18, 1919.

2 SHEETSSHEET 2.

til

WWI mo to the stationary rack E and the rotatmg lead current.

rnelvcrs B. cocxnuniv, or cmcrmmrr, OHIO, ASSIGNOR TO THE oner: & SHIPLEY Mac 'roor. COMPANY, or CINCINNATI, OHIO, a CORJQRATION or OHIO.

ENG-INE-LATHE-APRON 'oiLme SYSTEM.

Specification of Letters Patent. Patented Feb. 18, 19 19.

.Application filed. July 2, 1917. Serial No. 178,226.

To all whom it may concern:

Be it known that I, FRANCIS B. Coon- BURN, a citizen of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Engine-Lathe- Apron Oilin Systems, of which the following speci cation is .a full disclosure.

My invention relates to an improvement in the apron of an engine lathe.

An objectlof the invention is to provide an oil pumping and circulating system for lubricating the feed element bearings, operated by the feed mechanism. This requires an apron structure differing radically from the conventional. Also, it is quite a problem to place the oil pump in the apron to be driven by the feed mechanism, in such a manner as not to disturb the requisite definite relative positions of the feed instru-- mentalities. For the leaf-type apron, I substitute a box-like structure comprising a base oil container, an elevated gravity feeding oil chamber, a pump geared to the feed and supplying the chamber from the container, and conduits to the feed bearings, draining into the container.

The features of the invention are more fully set forth in the description of the accompanying drawings, forming a part of this specification, wherein Figure 1 is a front elevationof the carriage and apron, partly broken and in section, to more clearly show the details of construction of the oil ump.

Fig. 2 is a top plan new of the apron and contained mechanism.

Fig. 3 is a section on line 33, 'Fig. 2.

Fig. 4 is a section on line 44, Fig. 2.

Fig. 5 is a section on line 5 -5, Fi 2.

Fig. 6 is a section on line 66, Flg. 2.

Fig. 7 is a detail section on line 77, Fig. 6. i V

Fig. 8 is a detail section on line 8-8, Fig. 6.

The invention is illustrated in connection with an engine lathe comprising the bed 'A, having the usual guide-ways B, upon which slides the carriage O, supporting the crossfeed tool-slide D. The bedis provided with screw F, and theapron frame G is secured to the under surface of the forward overhanging edge of the carriage.

. to'its rear end a pinion 27 meshln The apron frame G comprises a floor plate 1, a front wall 2 and a rear wall 3, the floor plate extending rearwardly beyond the rear wall and provided with a marginal upturned flange or lip 4, to form an 011 well or. container H. The front wall 2 is provided witl1 an aperture 5 for convenient assemblin and removal of the parts of the apron mec anism, and said aperture is closed by a cover plate 6 secured in place by bolts 7.

The apron mechanism may be of any specific type, that illustrated in the drawings being a type selected for the purposes'of disclosure.

In general, this mechanism includes the usual slidable sleeve 10 splined to the lead screw'F and provided with opposing beveled pinions 12, 12 to be alternately intermeshed with a beveled ar 13, secured to a drive shaft 14, journa ed in the rear frame wall 3 and in the cover plate 6, (see Fig. '6). A pinion 15 is secured to the shaft 14 and meshes with a constantly driven clutch member 16, (see Figs. 2 and 5), laterally shifted by sultable mechanism to alternately engage with either of two driven clutch members 17, 18, the member 17 being loosely journaled in the front cover plate 6 and provided with gear teeth 19, adapted to mesh with a inion 20, on the tool-slide feed screw21, and the member 18 being secured to an intermediate transmission shaft 22, journaled in the sleeve of the memberv 16 and in a bearing 23 in the rear frame wall 3. The shaft 22 is provided with a pinion 24 meshing with a gear 25, which keyed to the carriage feed shaft 26, said aft being journaled in the front cover plate 6 and rear wall 3, (see Fig. 4) and havlng secured with the stationary rack E; A hand fe shaft 28, (see Fig. 3) is journaled in the front and rear frame walls 2 and 3, and is provided with gear teeth 2?, meshing with the gear 25 of the carriage feed shaft 26.

The upper surface, of the apron frameG, with its cover plate 6, is providedwith a series of connecting oil pockets and grooves, forming, with the lower surface of the carriage, a gravity feed oil chamber, from which suitable oil ducts and grooves distribute the oil to the various bearingsofthe apron mechanism, the surplus oil draining into the front cover p 26, and a Vertica oil-well From the well H, the oil is pumped up to the oil pockets of chambers, to

maintain a constant circulation as, long as theapron mechanism is in'operation;

Theoil chamber comprises a series of oil pockets 30, 31, 32,connected by intermediate 7 oil grooves 33, 3.4, and an oil pocket of the grooves 36 and lead downwardly and outwardly from the oil pocket 30 and su ly' oilto the front and rear bearings res ectively of the hand feed shaft 28 LA vertical oil duct40 leads downward from" the oil pocket 3L, to convey oil to therearbearin o 'the carriage feed shaft oil duct 41 leads downward from'thefloil pocket 35, of the front cover plate 6, to supply oil to thefront bearing of" said shaft. In thesame manner, vertical oil ducts 42 and 43 leaddownwardly from the. oil ocket'32 and'the oil pocket 35; respec- 'tivey, to supply oil to the rear and front bearings of the intermediate transmission shaft 22, see Fig. 5).

To supp y oilto thebearings of the drive shaft 14, I provide vertical oil ducts 44, 45,

leading downwardly from the oil pocket 35 of the cover plate-6 and from the oil pocket 32 of the apron. frame, respectively, each terminating in oil grooves 46', 47, formed on the inner surfaces of the cover-plate6 and frame wall 3, and leading to oil ducts 48, 49, in the front and rear bearings, respec-\ tively, of the drive shaft 14.

' The oil pump comprises a body portion secured to the front cover plate 6 and provided with reciprocating piston plung'er61, having a slotted head 62 for coiiperation with a driving stud 63, ecen-trically mount- ,ed'on a stud shaft 64. Secured tosaid stud shaft is a pinion 65 meshing with gear teeth ate 6, which issupplied from the pocket 30, through an oil p a conduit or spout 37 Two 011 ducts 38, 39',

charge conduit 72, conveys the oil upwardly and discharges into the apron oil pocket 30.

The floor plate 1, of the apron frame, drains toward a central medial point at which I provide a drain-plug 73, to permit a ,withdrawal of. the contents of the oilwell H.

, Having described my invention, I claim: 1. In an engine lathe incombin'ation with the bed and carriage mounted for travel on thebed, and a cross feed tool-holder on the carriage,- an apron structure depending from the carriage and provided with bearings,.feed elements supported in the apron bearings and organized for moving the carriage on. the bed and the slide on the carriage, said apron structure b'eingalso formed 'to constitute a base oil container below the bear'ngs, a relatively elevated gravity feeding il chamber above the bearingscommunicating with the oil container, and oil conduits leading downwardly from the chamber to the apron structure bearings, and

thence draining into the base container, an oil pump controlling the passage from the container to the chamber, and a pump operating mechanism operatively connected to the apron feed mechanism.

2. An apron structure as a housing for a feed mechanism, adapted for attachment to a lathe carriage, and comprising upper,

floor and wall members, the floor and upper members being formed respectively with a communicating base oil container and gravity feeding oil chamber, a pump controlling and chamber, bearings for feed elements positioned in the structure intermediate the container and chamber drawing into the container, and oil supplied through conduits leading from the chamber, said wall members being formed with provision for assembling feed elements and a pump operating element in their respective bearthe oil circulation between said container ings, andfenabling automatic oil pumping, 1

energized by the apron feeding mechanisms.

\ In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

FRANCIS B. GOCKBURN. Witnesses:

Henna K. GIBSON, CLARENCE B. Fos'rnn. 

